Philips Hudson2 200P3 Service Manual page 29

3. AC, DC Adaptor
3.1 Setup the AC I/P at 90VAC, and Output DC loading at 3.33Amp,
The DC output voltage is 18.0 0.9 V DC, Adjusting is no need.
3.2 DC setting
3.01 Detach 8052 to the scaler board before testing the function.
3.02 Apply 1.2Amp 18V DC voltage to 1105.
3.03 Connect inverter board to 8051
3.04 Check voltage at C2067 should be within the range 5V +/- 0.2V
(B)
3.05 Check voltage at C2077 should be within the range 3.3V +/- 0.15V
(B)
4. Display Adjustment
4.1Input signals check
In factory mode, use 64 gray level and set the R,G,B gain to 100%.
4.2 Display quality test
Use timing mode as describe in 2.2, and use the pixel on / off
pattern to adjust the clock until no stripe and adjust the phase
until clear picture.
Check all pre-setting 19 modes.
4.2.1 SOG mode test : Use following timing for SOG test
64 KHz/60Hz, 1280 X 1024, pixel=108 MHz
Horizontal
Frame border= 0
Total size = 15.620m s
Display size = 11.852m s
Rea r porch = 2.000m s
Sync width = 1.000m s
Sync polarity = -
4.3 Check of WHITE-D (B)
Apply a 1280*1024 / 60Hz signal with gray 64 pattern, set brightness
control at 100%, and contrast control at 50%. Adjust the R,G,B sub_gain,
for the screen center,
the 1931 CIE chromaticity (X, Y) co-ordinates shall be;
9300 K
x (center) 0.281
y (center) 0.311
Use Minolta CA-110 for color coordinates and luminance check.
Luminance : 200 Nits in the center of the screen when brightness at
100% and contrast set to 100%.
4.4 Check the digital interface
Check the 64 gray level color poor & noise condition.
Please refer to General Product Specification for timing table 1~47.
TIMING FOR HUDSON 200P 20" TFT UXGA COLOR LCD MONITOR
(VESA monitor timing standard Version 1.0 Release 0.7)
REFERENCE PATTERN GENERATOR : QuantumData 802G
Electrical Instructions (Continued)
(B)
(B)
Vertical
Frame border= 0
Total size = 16.670 ms
Display size = 16.000 ms
Rear porch = 0.580 ms
Sync width = 0.080 ms
Sync polarity = -
Sync on green
6500 K
0.015 0.312
0.015
0.015 0.338 0.015
5. PIN ASSIGNMENT OF VARIOUS WAFERS
5.1.1 PIN ASSIGNMENT OF INVERTER & WAFER 8051
PIN No. SIGNAL (INVERTER BOARD)
1 backlight power (18V)
2 backlight power (18V)
3 backlight power (18V)
4 backlight GND
5 backlight GND
6 backlight GND
7 backlight brightness ; 3.3V :8.0mA 0.5mA
8 backlight ;ON/OFF control :ON>2V,OFF<1V
PIN No. SIGNAL (WAFER 8051)
1 backlight power (18V)
2 backlight power (18V)
3 backlight power (18V)
4 backlight GND
5 backlight GND
6 backlight GND
7 backlight brightness ; 3.3V :8.0mA 0.5mA
8 backlight ;ON/OFF control :ON>2V,OFF<1V
5.1.2 PIN ASSIGNMENT OF WAFER 8052
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Hudson2 200P3
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0V :3.0mA 0.4mA
0V :3.0mA 0.4mA
SIGNAL (WAFER 8052)
LIGHT_BRI_CTL
LIGHT_PWR_CTL
GND
DC_SW
+3.3V
GND
+3.3V
GND
+5V
+5V
GND
GND
+18V
+18V
GND
GND
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